Editing Chin augmentation (section)

==Types of implants==
'''Silicone''' - [[Silicone]] chin Implants are one of the most commonly used implants for chin augmentation. They are soft, smooth, flexible and come in different shapes and sizes. They do not incorporate (stick) to the surrounding tissues, so the pocket must be made precisely. They usually stay in place, but may move, buckle and cause bone resorption where they contact the mandible in some cases. Since they are smooth, they can also be removed easily.

'''Polyethylene''' - [[Polyethylene]] chin implants, brand name Medpor, are hard, porous, slightly flexible and come in various shapes and sizes. They do incorporate, as the surrounding tissues can grow into the pores of the material. This fixes the polyethylene chin implants in place, and provides a blood supply to help prevent infection. It also makes these implants much more difficult to remove.

'''Polytetrafluoroethylene''' - Polytetrafluoroethylene, brand name [[Gore-Tex]], is used in plastic surgery and other operations is known by an abbreviation of its chemical name, [[ePTFE]] (expanded [[polytetrafluoroethylene]]) or Gore S.A.M. (subcutaneous augmentation material).<ref>Gore Medical Products Maas CS, Merwin GE, Wilson J, et al.: Comparison of biomaterials for facial augmentation. Arch Otolaryngol Head Neck Surg 1990 May; 116(5): 551-6.</ref> Because ePTFE is flexible and soft but very strong, it is inserted during operations in trimmed sheets and carved blocks and held to the bone by [[titanium]] screws. But because the material is [[porous]], the force that really holds the implant in place is soft tissue and bone growing through and into the implant.

The above artificial materials are used in medicine because they are [[biocompatible]] and have a low incidence of causing problems inside the human body. They are abundant, FDA cleared and can be used "off-the-shelf", without a donor site injury to the recipient.

'''Acellular dermal matrix''' - ADMs are another chin augmentation implant material. Commercially known as AlloDerm and known to physicians as acellular human cadaveric dermis, AlloDerm comes from tissue donors Just after death, technicians remove a layer of skin, remove the epidermis, and treat the remaining dermis with [[antibiotics]] and other substances to remove the donor's cells and [[DNA]] that would cause rejection. The [[Skin grafting|graft]] that emerges is often used to cover chin implants.

Other implant materials include Supramid, a braided nonabsorbable synthetic suture material in polymer shell and Mersiline, a mesh-like material that provides a scaffold on the bone.<ref>Guyuron B, Raszewski RL: A critical comparison of osteoplasic and alloplastic augmentation genioplasty. Aesthetic Plast Surg 1990 Summer, 14(3): 199-206</ref>